Preheat the oven to 400Â°F. Line a baking sheet with parchment paper and set aside.

Combine the mayonnaise, onion, capers, pickle relish, and lemon juice in a small bowl. Set the tartar sauce aside.

Arrange 3 shallow bowls or pie plates side by side. Fill the first with the flour, salt, and pepper; put the eggs in the second bowl and the bread crumbs in the third. Dredge each piece of fish first in the flour, then the eggs, and finally the bread crumbs.

Arrange the coated fish pieces on the baking sheet so that the pieces don't touch. Coat generously with cooking spray and bake for 5 minutes. Remove the baking sheet, turn the pieces over, and coat again with cooking spray. Bake for 5 minutes, or until the fish flakes easily with a fork. Serve with the tartar sauce.

*Limit saturated fat to no more than 10 percent of total calories--about 17 grams per day for most women or 21 grams for most men--and sodium intake to no more than 2,300 milligrams.

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